Windows 7 USB/DVD Download Tool unable to copy files

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Quando il “Windows 7 USB/DVD Download Tool” riporta come errore “unable to copy files” procedere in questo modo.
Utilizzare DISKPART con questa serie di comandi per ricreare la partizione :

diskpart
list disk
select disk #
clean
create partition primary
select partition 1
active
format quick fs=fat32
assign
exit

We were unable to copy your files. Please check your USB device and the selected ISO file and try again, We were unable to copy your files